package Demo01;

public class StringzhengzeDemo01 {
    public static void main (String[] args) throws Exception{
        String str = "yU*()&*()#@JKILOFFLKFSD*(o*()@#*(@#t*()#U*()@$@#@k";
        String regex = "[^a-z]";
        System.out.println(str.replaceAll(regex,""));
    }
}
